2Factor allows you to use custom sender id for sending messages via VODAFONE route.

Sender id must be a 6 character alphabet string. ( Ex. TFCTOR )

To request a new sender id, use 'Request Sender Id' option provided under
Addon Services >> Transactional SMS >> Request Sender Id

You are required to fill up the form provided ( as shown in below screenshot )

All the sender id approval requests are passed on to Vodafone for approval. Approval process might take approx 48 working hours of time ( or lesser )